Critical Next.js Vulnerability Allows Attackers to Bypass Middleware Authorization Checks

A critical security flaw has been disclosed in the Next.js React framework that could be potentially exploited to bypass authorization checks under certain conditions. The vulnerability, tracked as CVE-2025-29927 , carries a CVSS score of 9.1 out of 10.0. "Next.js uses an internal header...

Exploit for CVE-2025-29927

CVE-2025-29927-POC Introduction This repository contains...

Exploit for CVE-2025-29927

CVE-2025-29927-PoC-Exploit Proof-of-Concept for Authorization...

Exploit for CVE-2025-29927

CVE-2025-29927-PoC-Exploit Proof-of-Concept for Authorization...

Exploit for CVE-2025-29927

Scanner de Vulnerabilidade Middleware Subrequest do Next.js U...

CVE-2025-29927

A flaw was found in Next.js package. This vulnerability allows bypassing authorization checks within a Next.js application if the authorization check occurs in middleware. Mitigation Block or drop external user requests which contain the x-middleware-subrequest header from reaching your Next.js...

Exploit for CVE-2025-29927

Next.js POC for CVE-2025-29927 - Authorization Bypass in Ne...

Exploit for CVE-2025-29927

CVE-2025-29927 Next.js Middleware Authorization Bypass T...

CVE-2024-11171

In danny-avila/librechat version git 0c2a583, there is an improper input validation vulnerability. The application uses multer middleware for handling multipart file uploads. When using in-memory storage the default setting for multer, there is no limit on the upload file size. This can lead to a...

Authorization Bypass in Next.js Middleware

Impact It is possible to bypass authorization checks within a Next.js application, if the authorization check occurs in middleware. Patches For Next.js 15.x, this issue is fixed in 15.2.3 For Next.js 14.x, this issue is fixed in 14.2.25 For Next.js 13.x, this issue is fixed in 13.5.9 For Next.js...

GHSA-F82V-JWR5-MFFW Authorization Bypass in Next.js Middleware

Impact It is possible to bypass authorization checks within a Next.js application, if the authorization check occurs in middleware. Patches For Next.js 15.x, this issue is fixed in 15.2.3 For Next.js 14.x, this issue is fixed in 14.2.25 For Next.js 13.x, this issue is fixed in 13.5.9 For Next.js...

CVE-2025-29927

Next.js is a React framework for building full-stack web applications. Starting in version 1.11.4 and prior to versions 12.3.5, 13.5.9, 14.2.25, and 15.2.3, it is possible to bypass authorization checks within a Next.js application, if the authorization check occurs in middleware. If patching to ...

CVE-2025-29927

Next.js is a React framework for building full-stack web applications. Starting in version 1.11.4 and prior to versions 12.3.5, 13.5.9, 14.2.25, and 15.2.3, it is possible to bypass authorization checks within a Next.js application, if the authorization check occurs in middleware. If patching to ...

CVE-2025-29927 Authorization Bypass in Next.js Middleware

Next.js is a React framework for building full-stack web applications. Starting in version 1.11.4 and prior to versions 12.3.5, 13.5.9, 14.2.25, and 15.2.3, it is possible to bypass authorization checks within a Next.js application, if the authorization check occurs in middleware. If patching to ...

CVE-2025-29927 Authorization Bypass in Next.js Middleware

Next.js is a React framework for building full-stack web applications. Starting in version 1.11.4 and prior to versions 12.3.5, 13.5.9, 14.2.25, and 15.2.3, it is possible to bypass authorization checks within a Next.js application, if the authorization check occurs in middleware. If patching to ...

CVE-2025-29927 Authorization Bypass in Next.js Middleware

Next.js is a React framework for building full-stack web applications. Starting in version 1.11.4 and prior to versions 12.3.5, 13.5.9, 14.2.25, and 15.2.3, it is possible to bypass authorization checks within a Next.js application, if the authorization check occurs in middleware. If patching to ...

CVE-2025-29927

CVE‑2025‑29927 affects Next.js before patches: versions 12.3.5, 13.5.9, 14.2.25, and 15.2.3. The issue is an authorization bypass that can occur if the check runs in middleware. Fixed in the specified versions; patching to a safe version is recommended. If patching is infeasible, block external r...

Next.js Middleware Authorization Bypass Scanner

This module detects self-hosted Next.js applications affected by CVE-2025-29927, an authorization bypass in the middleware layer. Next.js tags its own internal subrequests with the x-middleware-subrequest header and skips middleware when it sees it. The header is trusted without verifying it...

Next.js 安全漏洞

Next.js is Vercel open source a React framework. Vercel Next.js suffers from a privilege bypass vulnerability that stems from the fact that if authorization checking occurs in middleware, an attacker can use the vulnerability to bypass authorization checking...

CVE-2024-11171 Improper Input Validation in danny-avila/librechat

In danny-avila/librechat version git 0c2a583, there is an improper input validation vulnerability. The application uses multer middleware for handling multipart file uploads. When using in-memory storage the default setting for multer, there is no limit on the upload file size. This can lead to a...